I am looking to design a pcb that can be used to solder a class D amplifier, an fm radio chip, and an arduino nano chip all on one border with as minimal traces as possible to reduce interference.
I have parts that I have used to breadboard this together, but there is a lot of interference that I believe to be due to the cheap and lengthy hookup wire I am using.
Here are the parts:
Class D amp: https://www.adafruit.com/products/1752
Arduino nano: http://www.digikey.com/product-detail/en/1501/1528-1021-ND/4990770
Fm radio chip: http://www.ebay.com/itm/RDA5802E-FM-Stereo-Low-IF-Digital-Radio-Module-Fo-MP3-MP4-Player-Replace-RDA5807-/331667174047
I'm open to using other parts if the candidate feels there are advantages to others. However, the requirements are that this is as high fidelity as possible, with as little interference as possible, as well as being as low power as possible. I know other classes of amps are better sounding, but class D should be sufficient and to my understanding it is the most power efficient amp.
Also, the final design will support audio input from either the fm radio or from aux input jack. The fm radio chip above has an 1/8" jack, however, I'm open to using an smd part that is soldered right in as an audio cord from the amp to the radio could be a possible source of interference.
The ideal candidate will have direct experience with audio amps, circuit design, rf interference abatement and wireless broadcast audio transmission.
This is the first stage of a large project, so there is room for more work if the project is completed successfully.